Time glitch
You can use the time glitch by going to settings and changing it to the next day and you will get rewarded with gems and gold on the fifth day you get 25000 gold and 5 gems. Just keep doing that and you can get lots of money.

Abbadon needs no rest
There was this glitch one morning that I versed abbadon and killed him. I went to the map and I could verse him again. I versed him so many times that I got from level 32 to level 36. I got the abbadon shield and sword and I got enough gems to buy the angry Felix. This was a awesome glitch I wish it would happen again. P.s. It did not work about five times that I had everything.

if you cannot download trainer then go to Chrome/Firefox's settings, specifically to the Privacy settings and simply unchecking the "Enable phishing and malware protection" option.

Some Game Trainers are sometimes reported to be a Virus or Trojan,
the most common is a keylogger called HotKeysHook or the file
has been packed/protected with VMProtect or Themida and
is recognized as Win32/Packed.VMProtect or Win32/Packed.Themida.
In ALL cases this is a FALSE ALARM as NONE
of the Game Trainers @ GGMANIA contain known malicious code!!